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Cornelius, OR weather and climate

Washington County, OR · population 13,700 · about 187 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Cornelius's own coordinates.

The year at a glance

Sunny days
164
clear or partly cloudy, per year
Precipitation
49 in
per year
Wet days
139
rain or snow per year
Snowfall
7 in
per year
Hot days
21
above 90 °F
Freezing nights
59
at or below 32 °F
Humidity
77%
average relative
Average temperature
52 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 46 °FDaily high, Feb: 50 °FDaily high, Mar: 55 °FDaily high, Apr: 60 °FDaily high, May: 68 °FDaily high, Jun: 73 °FDaily high, Jul: 82 °FDaily high, Aug: 82 °FDaily high, Sep: 76 °FDaily high, Oct: 64 °FDaily high, Nov: 51 °FDaily high, Dec: 45 °FDaily low, Jan: 33 °FDaily low, Feb: 33 °FDaily low, Mar: 36 °FDaily low, Apr: 39 °FDaily low, May: 45 °FDaily low, Jun: 50 °FDaily low, Jul: 54 °FDaily low, Aug: 53 °FDaily low, Sep: 49 °FDaily low, Oct: 42 °FDaily low, Nov: 37 °FDaily low, Dec: 33 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high465055606873828276645145
Daily low333336394550545349423733

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.55.07.5JanMarMayJulSepNovCornelius, Jan: 6.8 inCornelius, Feb: 5.2 inCornelius, Mar: 6.0 inCornelius, Apr: 4.5 inCornelius, May: 2.7 inCornelius, Jun: 1.6 inCornelius, Jul: 0.4 inCornelius, Aug: 0.5 inCornelius, Sep: 1.7 inCornelius, Oct: 4.2 inCornelius, Nov: 7.0 inCornelius, Dec: 8.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Cornelius6.85.26.04.52.71.60.40.51.74.27.08.0

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovCornelius, Jan: 7 daysCornelius, Feb: 9 daysCornelius, Mar: 9 daysCornelius, Apr: 10 daysCornelius, May: 14 daysCornelius, Jun: 16 daysCornelius, Jul: 25 daysCornelius, Aug: 25 daysCornelius, Sep: 21 daysCornelius, Oct: 15 daysCornelius, Nov: 8 daysCornelius, Dec: 7 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Cornelius7991014162525211587

Compare Cornelius with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Oregon city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).